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  <title>Open persistent Sybase connection</title>

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</div><hr /><div id="function.sybase-pconnect" class="refentry">
 <div class="refnamediv">
  <h1 class="refname">sybase_pconnect</h1>
  <p class="verinfo">(PHP 4, PHP 5)</p><p class="refpurpose"><span class="refname">sybase_pconnect</span> &mdash; <span class="dc-title">Open persistent Sybase connection</span></p>

 </div>
 
 <div class="refsect1 description" id="refsect1-function.sybase-pconnect-description">
  <h3 class="title">说明</h3>
  <div class="methodsynopsis dc-description">
   <span class="type">resource</span> <span class="methodname"><strong>sybase_pconnect</strong></span>
    ([ <span class="methodparam"><span class="type">string</span> <code class="parameter">$servername</code></span>
   [, <span class="methodparam"><span class="type">string</span> <code class="parameter">$username</code></span>
   [, <span class="methodparam"><span class="type">string</span> <code class="parameter">$password</code></span>
   [, <span class="methodparam"><span class="type">string</span> <code class="parameter">$charset</code></span>
   [, <span class="methodparam"><span class="type">string</span> <code class="parameter">$appname</code></span>
  ]]]]] )</div>

  <p class="para rdfs-comment">
   <span class="function"><strong>sybase_pconnect()</strong></span> acts very much like
   <span class="function"><a href="function.sybase-connect.html" class="function">sybase_connect()</a></span> with two major differences.
  </p>
  <p class="para">
   First, when connecting, the function would first try to find a
   (persistent) link that&#039;s already open with the same host,
   username and password.  If one is found, an identifier for it
   will be returned instead of opening a new connection.
  </p>
  <p class="para">
   Second, the connection to the SQL server will not be closed when
   the execution of the script ends.  Instead, the link will remain
   open for future use (<span class="function"><a href="function.sybase-close.html" class="function">sybase_close()</a></span> will not
   close links established by <span class="function"><strong>sybase_pconnect()</strong></span>).
  </p>
  <p class="para">
   This type of links is therefore called &#039;persistent&#039;.
  </p>
 </div>


 <div class="refsect1 parameters" id="refsect1-function.sybase-pconnect-parameters">
  <h3 class="title">参数</h3>
  <p class="para">
   <dl>

    
     <dt>
<em><code class="parameter">servername</code></em></dt>

     <dd>

      <p class="para">
       The servername argument has to be a valid servername that is defined
       in the &#039;interfaces&#039; file.
      </p>
     </dd>

    
    
     <dt>
<em><code class="parameter">username</code></em></dt>

     <dd>

      <p class="para">
       Sybase user name
      </p>
     </dd>

    
    
     <dt>
<em><code class="parameter">password</code></em></dt>

     <dd>

      <p class="para">
       Password associated with <em><code class="parameter">username</code></em>.
      </p>
     </dd>

    
    
     <dt>
<em><code class="parameter">charset</code></em></dt>

     <dd>

      <p class="para">
       Specifies the charset for the connection
      </p>
     </dd>

    
    
     <dt>
<em><code class="parameter">appname</code></em></dt>

     <dd>

      <p class="para">
       Specifies an <em>appname</em> for the Sybase connection.
       This allow you to make separate connections in the same script to the
       same database. This may come handy when you have started a transaction
       in your current connection, and you need to be able to do a separate
       query which cannot be performed inside this transaction.
      </p>
     </dd>

    
   </dl>

  </p>
 </div>


 <div class="refsect1 returnvalues" id="refsect1-function.sybase-pconnect-returnvalues">
  <h3 class="title">返回值</h3>
  <p class="para">
   Returns a positive Sybase persistent link identifier on success, or
   <strong><code>FALSE</code></strong> on error.
  </p>
 </div>


 <div class="refsect1 changelog" id="refsect1-function.sybase-pconnect-changelog">
  <h3 class="title">更新日志</h3>
  <p class="para">
   <table class="doctable informaltable">
    
     <thead>
      <tr>
       <th>版本</th>
       <th>说明</th>
      </tr>

     </thead>

     <tbody class="tbody">
      <tr>
       <td>4.2.0</td>
       <td>
        The <em><code class="parameter">appname</code></em> parameter was added.
       </td>
      </tr>

      <tr>
       <td>4.0.2</td>
       <td>
        The <em><code class="parameter">charset</code></em> parameter was added.
       </td>
      </tr>

     </tbody>
    
   </table>

  </p>
 </div>


 <div class="refsect1 seealso" id="refsect1-function.sybase-pconnect-seealso">
  <h3 class="title">参见</h3>
  <p class="para">
   <ul class="simplelist">
    <li class="member"><span class="function"><a href="function.sybase-connect.html" class="function" rel="rdfs-seeAlso">sybase_connect()</a> - Opens a Sybase server connection</span></li>
   </ul>
  </p>
 </div>


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